/*
 * Copyright 2013-2019 The OpenZipkin Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package brave.dubbo.rpc;

import java.io.IOException;
import java.net.ServerSocket;

class PickUnusedPort {
  static int get() {
    try {
      ServerSocket serverSocket = new ServerSocket(0);
      int port = serverSocket.getLocalPort();
      serverSocket.close();
      return port;
    } catch (IOException e) {
      throw new AssertionError(e);
    }
  }
}
